MCQOPTIONS
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MCQOPTIONS
This section includes 832 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 651. |
The force per unit length is the unit of |
| A. | Surface tension |
| B. | Compressibility |
| C. | Capillarity |
| D. | Viscosity |
| Answer» B. Compressibility | |
| 652. |
Euler's dimensionless number relates the following |
| A. | Inertial force and gravity |
| B. | Viscous force and inertial force |
| C. | Viscous force and buoyancy force |
| D. | Pressure force and inertial force |
| Answer» E. | |
| 653. |
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be |
| A. | 500 kg |
| B. | 1000 kg |
| C. | 1500 kg |
| D. | 2000 kg |
| Answer» E. | |
| 654. |
Density of water is maximum at |
| A. | 0° C |
| B. | 0° K |
| C. | 4° C |
| D. | 100° C |
| Answer» D. 100° C | |
| 655. |
The specific weight of water is 1000 kg/m3 |
| A. | At normal pressure of 760 mm |
| B. | At 4°C temperature |
| C. | At mean sea level |
| D. | All the above |
| Answer» E. | |
| 656. |
The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» C. Steady flow | |
| 657. |
The flow in which the particles of a fluid attain such velocities that varies from point to point in magnitude and direction as well as from instant to instant, is known as |
| A. | One dimensional flow |
| B. | Uniform flow |
| C. | Steady flow |
| D. | Turbulent flow |
| Answer» E. | |
| 658. |
The discharge over a rectangular notch is |
| A. | Inversely proportional to H3/2 |
| B. | Directly proportional to H3/2 |
| C. | Inversely proportional to H5/2 |
| D. | Directly proportional to H5/2 |
| Answer» C. Inversely proportional to H5/2 | |
| 659. |
The volumetric change of the fluid caused by a resistance is known as |
| A. | Volumetric strain |
| B. | Volumetric index |
| C. | Compressibility |
| D. | Adhesion |
| Answer» D. Adhesion | |
| 660. |
Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure. |
| A. | Plus |
| B. | Minus |
| C. | Divide |
| D. | Multiply |
| Answer» C. Divide | |
| 661. |
A turbine develops 10000 kW under a head of 25 meters at 135 r.p.m. Its specific speed is |
| A. | 175.4 r.p.m. |
| B. | 215.5 r.p.m. |
| C. | 241.5 r.p.m. |
| D. | 275.4 r.p.m |
| Answer» D. 275.4 r.p.m | |
| 662. |
Viscosity of water in comparison to mercury is |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | Higher/lower depending on temperature |
| Answer» B. Lower | |
| 663. |
Casting of a centrifugal pump is designed so as to minimize |
| A. | Friction loss |
| B. | Cavitations |
| C. | Static head |
| D. | Loss of kinetic energy |
| Answer» E. | |
| 664. |
The rise or depression of liquid in a tube due to surface tension will increase in size of tube will |
| A. | Increase |
| B. | Remain unaffected |
| C. | May increase or decrease depending on the characteristics of liquid |
| D. | Decrease |
| Answer» E. | |
| 665. |
The unit of viscosity is |
| A. | Meters² per sec |
| B. | kg-sec/meter |
| C. | Newton-sec per meter² |
| D. | Newton-sec per meter |
| Answer» C. Newton-sec per meter² | |
| 666. |
The maximum number of jets generally employed in impulse turbine without jet interference is |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 12 |
| Answer» C. 8 | |
| 667. |
If the coefficient of discharge is 0.6, then the discharge over a right angled notch is |
| A. | 0.417 H5/2 |
| B. | 1.417 H5/2 |
| C. | 4.171 H5/2 |
| D. | 7.141 H5/2 |
| Answer» C. 4.171 H5/2 | |
| 668. |
The normal stress in a fluid will be constant in all directions at a point only if |
| A. | It is incompressible |
| B. | It has uniform viscosity |
| C. | It has zero viscosity |
| D. | It is at rest |
| Answer» E. | |
| 669. |
If no resistance is encountered by displacement, such a substance is known as |
| A. | Fluid |
| B. | Water |
| C. | Gas |
| D. | Ideal fluid |
| Answer» E. | |
| 670. |
The meatcentric height is the distance between the |
| A. | Centre of gravity of the floating body and the centre of buoyancy |
| B. | Centre of gravity of the floating body and the metacentre |
| C. | Metacentre and centre of buoyancy |
| D. | Original centre of buoyancy and new centre of buoyancy |
| Answer» C. Metacentre and centre of buoyancy | |
| 671. |
A body floats in stable equilibrium |
| A. | When its meatcentric height is zero |
| B. | When the metacentre is above e.g. |
| C. | When its e.g. is below its center of buoyancy |
| D. | Metacentre has nothing to do with position of e.g. for determining stability |
| Answer» C. When its e.g. is below its center of buoyancy | |
| 672. |
The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta) |
| A. | 2gH |
| B. | H × √(2g) |
| C. | 2g × √H |
| D. | √(2gh) |
| Answer» E. | |
| 673. |
If the net positive suction head (NPSH) requirement for the pump is not satisfied, then |
| A. | No flow will take place |
| B. | Cavitation will be formed |
| C. | Efficiency will be low |
| D. | Excessive power will be consumed |
| Answer» C. Efficiency will be low | |
| 674. |
Surface tension |
| A. | Acts in the plane of the interface normal to any line in the surface |
| B. | Is also known as capillarity |
| C. | Is a function of the curvature of the interface |
| D. | Decreases with fall in temperature |
| Answer» B. Is also known as capillarity | |
| 675. |
The center of pressure of a surface subjected to fluid pressure is the point |
| A. | On the surface at which resultant pressure acts |
| B. | On the surface at which gravitational force acts |
| C. | At which all hydraulic forces meet |
| D. | Similar to metacentre |
| Answer» B. On the surface at which gravitational force acts | |
| 676. |
When the Mach number is between __________ the flow is called super-sonic flow. |
| A. | 1 and 2.5 |
| B. | 2.5 and 4 |
| C. | 4 and 6 |
| D. | 1 and 6 |
| Answer» E. | |
| 677. |
The Newton's law of resistance is based on the assumption that the |
| A. | Planes of the body are completely smooth |
| B. | Space around the body is completely filled with the fluid |
| C. | Fluid particles do not exert any influence on one another |
| D. | All of the above |
| Answer» E. | |
| 678. |
One stoke is equal to |
| A. | 10-2 m2/s |
| B. | 10-3 m2/s |
| C. | 10-4 m2/s |
| D. | 10-6 m2/s |
| Answer» D. 10-6 m2/s | |
| 679. |
The absolute pressure is equal to |
| A. | Gauge pressure + atmospheric pressure |
| B. | Gauge pressure - atmospheric pressure |
| C. | Atmospheric pressure - gauge pressure |
| D. | Gauge pressure - vacuum pressure |
| Answer» B. Gauge pressure - atmospheric pressure | |
| 680. |
In a reciprocating pump, air vessels are used to |
| A. | Smoothen the flow |
| B. | Reduce suction head |
| C. | Increase delivery head |
| D. | Reduce acceleration head |
| Answer» E. | |
| 681. |
A square surface 3 m × 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is |
| A. | 9,000 kg |
| B. | 13,500 kg |
| C. | 18,000 kg |
| D. | 27,000 kg |
| Answer» C. 18,000 kg | |
| 682. |
Which of the following instrument can be used for measuring speed of an aeroplane? |
| A. | Venturimeter |
| B. | Orifice plate |
| C. | Pitot tube |
| D. | Rotameter |
| Answer» D. Rotameter | |
| 683. |
The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe. |
| A. | Less than |
| B. | More than |
| C. | Equal to |
| D. | None of these |
| Answer» C. Equal to | |
| 684. |
The flow in a pipe or channel is said to be non-uniform when |
| A. | The liquid particles at all sections have the same velocities |
| B. | The liquid particles at different sections have different velocities |
| C. | The quantity of liquid flowing per second is constant |
| D. | Each liquid particle has a definite path |
| Answer» C. The quantity of liquid flowing per second is constant | |
| 685. |
The force present in a moving liquid is |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | All of these |
| Answer» E. | |
| 686. |
Which of the following turbine is preferred for 0 to 25 m head of water? |
| A. | Pelton wheel |
| B. | Kaplan turbine |
| C. | Francis turbine |
| D. | None of these |
| Answer» C. Francis turbine | |
| 687. |
Dynamic viscosity of most of the liquids with rise in temperature |
| A. | Increases |
| B. | Decreases |
| C. | Remain unaffected |
| D. | Unpredictable |
| Answer» C. Remain unaffected | |
| 688. |
Dynamic viscosity of most of the gases with rise in temperature |
| A. | Increases |
| B. | Decreases |
| C. | Remain unaffected |
| D. | Unpredictable |
| Answer» B. Decreases | |
| 689. |
A point, in a compressible flow where the velocity of fluid is zero, is called |
| A. | Critical point |
| B. | Vena contracta |
| C. | Stagnation point |
| D. | None of these |
| Answer» D. None of these | |
| 690. |
The critical depth meter is used to measure |
| A. | Velocity of flow in an open channel |
| B. | Depth of flow in an open channel |
| C. | Hydraulic jump |
| D. | Depth of channel |
| Answer» D. Depth of channel | |
| 691. |
A venturi-flume is used to measure |
| A. | Pressure of liquid |
| B. | Discharge of liquid |
| C. | Pressure difference between two points in a channel |
| D. | Pressure difference between two points in a pipe |
| Answer» C. Pressure difference between two points in a channel | |
| 692. |
A fluid which obeys the Newton's law of viscosity is termed as |
| A. | Real fluid |
| B. | Ideal fluid |
| C. | Newtonian fluid |
| D. | Non-Newtonian fluid |
| Answer» D. Non-Newtonian fluid | |
| 693. |
In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock) |
| A. | p/sinα |
| B. | 2p/sinα |
| C. | p/2sinα |
| D. | 2p/sin (α/2) |
| Answer» D. 2p/sin (α/2) | |
| 694. |
The hydraulic efficiency of an impulse turbine is the |
| A. | Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine |
| B. | Ratio of the actual work available at the turbine to the energy imparted to the wheel |
| C. | Ratio of the work done on the wheel to the energy of the jet |
| D. | None of the above |
| Answer» D. None of the above | |
| 695. |
Poise is the unit of |
| A. | Surface tension |
| B. | Capillarity |
| C. | Viscosity |
| D. | Shear stress in fluids |
| Answer» D. Shear stress in fluids | |
| 696. |
The discharge through a reaction turbine __________ with the increase in unit speed. |
| A. | Decreases |
| B. | Increases |
| C. | Remain same |
| D. | None of these |
| Answer» B. Increases | |
| 697. |
Hot wire anemometer is used to measure |
| A. | Pressure in gases |
| B. | Liquid discharge |
| C. | Pressure in liquids |
| D. | Gas velocities |
| Answer» E. | |
| 698. |
A differential manometer is used to measure |
| A. | Atmospheric pressure |
| B. | Pressure in pipes and channels |
| C. | Pressure in Venturimeter |
| D. | Difference of pressures between two points in a pipe |
| Answer» E. | |
| 699. |
A manometer is used to measure |
| A. | Atmospheric pressure |
| B. | Pressure in pipes and channels |
| C. | Pressure in Venturimeter |
| D. | Difference of pressures between two points in a pipe |
| Answer» C. Pressure in Venturimeter | |
| 700. |
Manometer is used to measure |
| A. | Pressure in pipes, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressure |
| D. | Difference of pressure between two points |
| Answer» B. Atmospheric pressure | |